Linear lift and counterbalance aircraft passenger door
US5255876A · kind A · utility
7Cited by
9References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Jun 8, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/531
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method and apparatus for vertically lifting a main entry door in an aircraft in order to clear stop fittings and open outward. A hollow shaft having a counterbalance spring and piston therein, which shaft is mounted in a hinge arm and is rotated via a drive chain. The shaft functions to rotate the door by means of splines on the shaft. A door attachment fitting is secured to the top of the piston and slides on the splines during vertical movement of the door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.